I wasn't sure if I'd should post this under plumbing or modifications. I guess it qualifies as both, but since there is a plumbing section, I thought I'd post it here. This was the original shower faucet, with both a hot and a cold knob. There was nothing wrong with it, but I prefer a single handled faucet.
There was one thing about it that bothered me though. If you look at the picture, you'll notice that the diverter valve is facing up - on the top of the faucet. Now, I've looked around at other installations and I see a lot of them installed like that. The part that bothers me is: the casing around the diverter valve is not water tight! There is a visible gap there. Not good in ANY kind of plumbing application. (And, as I expected, the inside of the fixture was full of soapy water when I removed it.)
So, I replaced it with THIS SHOWER FAUCET
You'll notice I installed it with the diverter valve on the bottom. Because of that, there were a couple of adjustments to make. First, detach the handle, spin it 180 degrees and reinstall it. Second, I tested which side the hot water needed to be attached to in order to make the cold water come on first. That way you won't burn yourself when you first turn it on.
I like the single handled shower faucets a lot, but there is a drawback to them. The water only comes out at one speed - full bore. With a two knob faucet, you can turn down the volume of water coming out of the shower head. That's why I added THIS FLOW ADJUSTING VALVE
Here you can adjust the strength of the outflow. I probably didn't need to install it because I had already replaced the shower head with an Oxygenics RV model. You can also adjust the water volume from here.